Freshness-keeping efforts are undertaken by various firms during the life cycle of fresh products. Therefore, the consistent linkage of these freshness-keeping levels is critical to the freshness of the products launched into the market. This paper investigates the optimal freshness-keeping...

In actual environmental investment for industry, the stakeholders are often required to evaluate the investment strategies according to their own subjective preferences in terms of numerical values from various criteria, such as economic effectiveness, technique feasibility and environmental...